Characterization of the full elastic effect of the near surface on seismic waves

(19)

(11)

EP 0 421 658 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	05.08.1992 Bulletin 1992/32

(43)	Date of publication A2:
	10.04.1991 Bulletin 1991/15

(21)	Application number: 90310489.1

(22)	Date of filing: 25.09.1990

(51)	International Patent Classification (IPC)⁵: G01V 1/00, G01V 1/36, G01V 1/20

(84)	Designated Contracting States:
	DE FR GB

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Priority:

04.10.1989 US 417792

(71)	Applicant: ATLANTIC RICHFIELD COMPANY
	Los Angeles California 90071 (US)

(72)	Inventor:
	Airhart, Tom P. Plano, Texas 75075 (US)

(74)	Representative: Garratt, Peter Douglas et al
	Mathys & Squire 100 Grays Inn Road London WC1X 8AL London WC1X 8AL (GB)

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References cited: :

(54)	Characterization of the full elastic effect of the near surface on seismic waves

(57) A method of seismic exploration uses recordings from both surface receivers and buried sensors to determine the full elastic effect of the near surface layer on an applied seismic wave. The surface receivers are arranged relative to the seismic source location so that rotational effects may be detect. Buried sensors are located so that vertical effects may be detected. This full elastic effect may be used in subsequent seismic data acquisition to reconcile the effect of the near surface so that the response of the underlying rock formations may be known.

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